Furnace for heating metal articles and the like



W. H. SOUTHORNE. FURNACE FOR HEATING METAL ARTICLES AND THE LIKE.

APPLICATION FILED DEC.27, 191B- Patented July 27, 1920.

PATENT. OFFICE.

WILLIAM HENRY soU'rHoRNE, or NORTH SHIELDS, ENGLA FURNACE non HEATING METAL-ARTICLES AND THE LIKE.

Specification of Letters Patent. lfifljn ted 111) 27 1920.

Application filed December 27,- 1918. Serial No.268,5l.8.'

To all whom it may concern: 7

Be it known that I, WVILLIAM HENRY SoU'rHonNn, a subject of the King of Great Britain and Ireland, residing at North Shields, in the county of Northumberland, England, have invented certain new and useful Improvements in or Relating to Furnaces for Heating Metal Articles and the like, of which the following is a specification.

This invention relates to furnaces for heating metal articles and the like and is more particularly intended for furnaces for hardening or annealing steel tools, gages and other articles, the said improvements having for their principal object to insure the uniform heating of the articles under treatment and thereby to obviate the tendency to distortion of the said articles. At the sametime a uniform degree of hardness or temper throughout the articles treated is secured.

According to my invention, I provide the furnace with a table or bottom capable of being revolved, on which table or bottom the articles to be treated are placed, and I so arrange the heating appliances that the flame does not impinge upon the article on the table or bottom. 7

The table or bottom is sosupported that it can be readily removed and replaced or renewed, without dismantling or disturbing the body of the furnace.

The upper surface of the table or bottom may be corrugated or roughened so that the air or gases in the furnace have free access to the under sides of the articles being treated.

One method of carryingout my invention is illustrated on the accompanying drawing, in which Figure 1 is a front elevation of the furnace:

Fig. 2 is a side elevation of same:

Fig. 3 is a plan of same, and,

Fig. 4 is a section on the line A-A Fig. 1.

The same symbols of reference denote the same parts in the various views.

a is the body of the furnace, which is preferably provided with an outer metal casing I), supported by legs 0, or by some other suitable stand. The roof d of the furnace chamber is preferably arched. A circular hole e is provided through the floor of the furnace, and in the hole is mounted a revolving table or bottom f.

the burner 25.

.Theupper portionof the table f ispreferably of larger diameter than the lower portion, thus forming a lip P, which projects I over the hole 6 and prevents the escape of the hot air or gases.

The upper surface of the table f is cor rugated or roughened as shown at g, thus insuring free access of the air or gases to the under side of articles placed on the table.

The table 7 rests upon a plate or carrier 71. fixed on a vertical shaft 7', by the set screw is or by other suitable means. The plate 71. is

provided on its upper surface with a pin or' projection l which fits into a correspondingly shaped recess m in the under side of the table f, thus insuring the table revolving with the plate. a is a bracket acting as a bearing for the shaft j, and supporting the plate It and the table 1".

A worm wheel 0 is fixed on the shaft j and gears with a worm p on the horizontal shaft q, which is carried by brackets r, 7-, s and is a driving pulley fixed on the shaft g.

The furnace is heated by means of a Bunsen burner 25 which ma be arranged on one side of the furnace. he burner is so arranged that the flame travels across the under side of the roof and down the opposite side of the furnace, and does not impinge directly upon the article on the table 7 u is the gas inlet, and o the air inlet to The products of combustion pass out of the furnace by the passage w. w is the door closing the mouth y of the furnace. The mouth 3 is made large enough to allow the table f to be removed from the carrier 71, and replaced or renewed without dismantling or interfering with the body of the furnace.

In general it will be understood that I do not confine myself to the details of construction hereinbefore described, as the details may be varied considerably within a fair interpretation of my claim.

What I claim as my invention and desire to secure by Letters Patent of the United States of America is In a furnace for hardening and annealing rier beneath said table, a shaped recess in VBunsen burner projecting into the top of the top of said carrier, a similarly shaped one of the concave sides of said chamber, for projection on the bottom of the reduced the purposes described. 7 portion of the table adapted to engage said In testimony whereof I afiix my signature 5 recgss, means for supporting and lrotfating in presence of tWo witnesses.

sai carrier, an openin at one enc 0 said 1 chamber closed by a do dr a passage leading WILLIAM HENRY SOUTHORNL' from the top of said chamber at the other Witnessesz v V end through which the products of combus- ARTHUR TURNER, 10 tion pass and heating'means comprising a CHARLES STEPHEN GARDNER. 

